Experimental: Experimental Explicit
Cannabis user performs visuo-motor rotation tasks informed of an explicit strategy to maximise performance
Behavioral: Visuo-motor rotation
Participant moves a cursor on a screen by sliding a pen over a digital tablet. Participants perform a center-out movement, aiming to a target that appears over one of a set of eight markers radially distributed. In several block of trials, the mapping of the pen position to the cursor is rotated.
Behavioral: Explicit strategy
Participant is provided with an explicit instruction as to how counteract the effects of the visuo-motor rotation via aiming to a marker adjacent target